Somebody Help, Misfire Issues

[SamJee]

Hi All,

Just wondering if any of you can give me some advice before I give up on this car :boring:

From day one it has been plauged with electrical issues making it run poorly,

The most recent one which I cant seem to get to the bottom of is the car misfiring loads and almost stalling when cold, the problem isnt anywhere near as bad after a minute or so but misfire is still noticeable at low revs,

I have tried the following:

• Changed coil pack & spark plugs
• Cleaned Throttle Body
• Took rocker cover off and gave the engine a good clean and checked for any blocked breather pipes
• Replaced the MAP sensor
• Replaced the Coolant Temp Sensor
• Took off the black box at the back of the engine and repaired wiring
• Replaced lambda sensor before cat
• Replaced TDC sensor

The list goes on and on to be honest and the car is still running very poorly and showing poor MPG,

Now I am running out of ideas but since I have thrown so much money at this car trying to get it fixed it would seem a shame to give up now,

I have been reading people saying NGK spark plugs and Renaults dont agree (those are what I put in when also changing the coil pack) so I have some original Renault spark plugs on order.

Can anyone else think of anything that may be worth trying other than the obvious and scrapping this french pile of crap

I was thinking if all else fails go down the route of replacing the wiring loom, does anyone have any expierenced with this?

Any advice will be greatly appreciated,

Thanks, Sam

 

[Jonny1*2]

injector issue? have you had it plugged into a diagnostic kit instead of guessing?

 

[Matthew]

I thought the Clios only ran well with the NGK plugs?!?

 

[Jonny1*2]

its not a sport, but iirc, renault use ngk plugs as standard on all their stuff.

 

[SamJee]

I thought this and thats why I replaced the old original plugs with NGK's but upon a lot of reading it seems they come with Champion plugs so I have ordered 4 of these.

Would faulty plugs really cause such an issue though and flag up the engine management light on my dash?

Thanks!

 

[LowLife.]

Injectors? Have you tried a compression test?

 

[SamJee]

Injectors is next on my list of things to change, No I havent tried a compression test, How would I go about doing one?

 

[MicKPM]

I think diagnostics should be next on your list... As Jonny said above in #2 - then you'll know exactly what is causing the MIL to be on in the first place